package 面试v1.阿里;

import java.util.*;

public class ali {

    public static void main(String[] args) {
        Map<Integer,Integer> map =new HashMap<>();
        Collection<Integer> collection  = new ArrayList<>();
        Collection<Integer> collection1 = new Vector<>();
        Collection<Integer> collection2 = new LinkedList<>();
        Collection<Integer> collection3 = new PriorityQueue<>();
        Collection<Integer> collection4 = new Stack<>();
    }
}
